Typewriting machine



June: 17, 1930. E. G ROWLEY I TYPEWRITING MACHINE Filed June 50, 1927 ZYSheetS-Sheet l June 17, 1930. E. G. ROWLEY v TYPEWRITING MACHINE Fiied June so, 1927 Z SheetS-Sheet 2 Patented June 117, I930 v EDWARD G. ROWLEY, for BELLE- ilma; W JERSEY, 'Assl'suofi'mo messages- ELLIOTT FISHER COMPANY, OFNEVV Y'LVYPEWRITINGMAQVHINE"' V Application fi le d June 30,

This invention relates to platen-adjust nient in type vriting' machines, and will be shown inparticular as being applied to "the portable type of the Underwood machine, the object being to simplify and to improve heretoforeadjustment-devices and arrange i ments'.

' relation between the ustment, which to afford proper platen, and the vprinting plane, is of great importance, as it governs the clearness and evenness of the imprints,

' and is necessary since the type ba'rsT are I I stantially at right angles to the entire type} while the ordinary.

1 j as limited in. their movement towardsfthe r -f platen the usual abutment. V 1

It i has been customary to effect the adjustment by means of certain links of a" parallel link-system, which, provided-Kat either'side of the machine, is employed to guide the shift-frame, which supports the platen-carriage, in its up-an d-downj caseshift-movement. j

The adjustment is usually a pivotal'gone,

given to the shift-frame and the platen whole, in sucha way that with suitable construction, the platen-axis is adjusted sub face of the type-bars at the time of printing,

platen remains practically undisturbed and parallel to the printingpla'ne. v j Means of platen-adjustment heretofore in evidence as screws, controlling one of the stationary axes of the link-system and 00- operatingwith additional parts as slide plates,- subsidiary: frames,- or the like, ad-

I *justably fastened to the main frame have Y been rather inaccessibly' hidden at :the; rear an: i discomforting readjustment I .w-liile requiring m'acl'1ine."f V 3 I N i One feature ofthe invention is to bring expert without necessitating any disassem novel arrangement provides means of part of standard machines, Complicating their mechanical structureand; especially of the platen partial disassembling of the the adjusting devicejintoready reach of the bli ng,

adjustment at the swinging end of theguide' links, whereby readiness and accessibility oscillatory case-shift- 3 t0". illustrate I f e e 1 r ar ,b i 't -f sl ift be corrected. A rack 1e27 serial No. 202,620.,,

will obtained remain unchanged. c Another featureof the' inventio the novel adjustment-device prop er, which, being thenature of ian ladjustablei -eccentric, may be used 9. 11% t omp c ne s; of ju tment nd shape and :adya'ntages will l Platen and type-bar ..dot-

and-dash; J p Figure 2 is sectional, sideffel e vation, showing parts mainly engaged in the caseshift-operation with the new platen ing device attached thereto. v i Q Figu're 32 isla detail View ofn Elguref 2 showing the platen, the shift-frame Iandzth e casegshift-guide-linksl frame and platen, as allow d 'ffor fby novel adjusting device, c A

Figure 4 is a vievyi largely broken-away and similar to F igure 3, sllowingthe new l ju g e n mqdi b t d "man. showing extreme positions f, adjustment in" dot-and-dash. r Figure-5 isa plany'iew, diagrammaticals means to frame against 'unduejlater l dingi r gu p i ting the'gusiialsegment-stop 1 111; in printingpositionrelati 3 it 2, which is oper'ated i ni carriage, at its lowerlp 'r track-elenients 5L and moun meansof'balls 5 upon-tr A A d't0 the nfiefiame; a. whole by the reference numeral da s, hdw i "p ten the track-member 7 is; shown to -be I j order to fallow/inac uracies in the at; wai t comoaawr i os-pspawraaq hileikinematic"conditions t alte he en es Lil mg po1nts ofthe. linksfor platen adjust- .o lea er-adden-a indicated the two'extren' e 'positions ofshi'ftg e J 2; 9, prov ded at the carriage, in combination with a pinion 10, escapement-device 11 and spring-drum 12, is

to indicate the carriage-actuating mechato parallel link-connections,

7 sidered with reference to said link-connection.

The lower arm 19 is rigidly secured at its rear end to a rock-shaft 20, which in turn is pivoted to the main frame 17 by screws 21, while its forward endis fastened to the shift-frame by pivots 22. The upper guidearm 18 correspondingly is pivoted at its rear end to the main frame, and forwardlypivotally engaged to the shift-frame by means of the novel adjusting device 23, which, it should be noted, is placed upon a part of the shiftframe readily accessible in,

standard constructions.

A shouldered-screw 24 may serve as a pivot for the guidearms 18 and be threaded eccentrically into a disk 25 mainly constituting the adjusting device, and which in turn is fastened to the arm 14 of the shift 8 frame-structure, preferably by screws 26 I passing through arcuate slots 27 concentrically provided in said disk. When it is desired to adjust the shift-frame, the screws are loosened up and the disk rotated, and,

due to the guide-arms 18 being carried eccentrically, a rotation of the disk will tend to move the carriage towards or away from the printing point. The shift-frame is thus given a tilting movement about pivots 22,

and the two extreme positions hereby rc'leached are indicated in Figure 3 in dot-andash.

After the screws 26 are tightened up again, the disk 25 may further be locked in place by suitable devices, such as notches 28 circumferentially provided on the disk, and a pin 29 to fit the notches and which is rigidly secured to the shift-frame. This notch arrangement obviously will also aid inifine adjustment, andv the diameter of the disks and the size and pitch of the notches may be formed accordingly to give a measure for the extent of rotation relatively to the shift-frame.

In 'lligure4i's shown a modification of the adjusting device. A bracket'30 is movably fastened to the shift-frame by screws 31 passing through straight slots 32 provided in the bracket, so that by loosening up the screws, the frame maybe adjusted to bring the carriage towards or away from the printing point. After the adjustment is made, the screws are tightened up again to secure the bracket in place.

To actuate the case-shift mechanism, as described above, for writing upper casecharacters, a key-operated lever- 33, Figure 2, fulcrurned at 34 in connection with the main frame, is provided with an extension 35 to co-operate with an inwardly-projecting pin 36, secured to the shift-frame and shown to be integral with the pivots 22 (see Figure 1). Upon depression of the lever 33, the extension 35 will cam upwardly pin 36, imparting motion to the shift-frame, which 1s limited for upper and lower case-positions by stop-screws 37 and link guided, as described above, whereby said stop-screws adjustably threaded into ears 38 struck up from the main frame 17 and locked in place by lock-nuts 39, are to serve as abutments for an extension 40 provided on the righthand lower guide-arm 19. When the operating pressure is released, the shift-frame will gravitate downwardly to rest its weight upon the lower stop-screw 37, while the case shift-lever 33 swings back to its initial position where it is held, while ineffective, by a spring 41, which causes an car 42, provided upon the extension 35, to bear against the edge 43 of an opening provided in the side Wall of the main frame. v

A means to guide the shift-frame 8 against undue lateral movement is shown in Figure 5. At the right-hand side, the shift-frame is held by a rigid stop formed with a shouldered screw 44, threaded into the mainframe and equally used as a pivot for the right hand upper guide-arm 18, while the left hand side of the shift-frame is-taken care of by an adjustable stop, including a tapped and collared hub 45, jointly to'be used as a pivot for the left hand upper guide-arm 18 and also a loclcnut cooperative with a lock-nut 46, to provide a stop-screw 47 adjustable relatively to the main frame into which it is threaded, and relatively to the shift-frame, which it is to guide.

'maymore easily occur, and where compactness, lightness, cheapness and accuracy in operation combined are vital factors.

7 Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

' -Having thus described my. invention, I

J claim:

1. In a typewriting machine including a main frame, a carriage mounted for caseshift movement and swinging type-bars, the combination of a system of swingable arms carried by the main frame, said systemineluding a pair ofiarms, an upper'and a lower one; with their swinging ends extending forwardly ateither side of the machine, a shift-frame within the nain frame supporting the carriage and to be vguided by said arms for case-shift movement, andan eccentric device at either 'side'ofthe caseshift frame including a disk rotatably ,fastened to the shift-frame and carrying eccentrically one end" of one ,of said upper arms, said disk to be rotated vto adjust the secure proper relation between said carriage and said type-bars. e

i I ,2. In a typewritingv machine including a mainframe, a carriage mounted [for caseshiftmovement and swinging'type-bars, the

combination of a system of sw'ingable arms carried by the main frame, said system in eluding a pair oflarms, an up-perone and a lower one, with their-swinging endsiextendmg forwardly at either side of the main frame, a .shifteframe within the mainframe supporting the'carriage and to be guidedby 1 arms for case-shift movement, and an "eccentriccleviceat either side of the shiftframe, effective to adjust the p'osition of the shift-If ramerwith reference topthe main "frame for. proper relation between the car riage and type-bars, said device including a disk rotatablyfastened to the shift-frame andeccentrically"carrying one end of said .7 E40 upper arms and having concentric slots to "serve as guides'fo-r its rotary movement for ad ustment upon the shift-frame in co-op- 3 eration-with pins orfscr'ewsfastened to the:

, shift-frame within the slots.

\ In a typewriting machine including a mainframe, a carriagemounted for caseshift movement andfs winging type-bars, the

'combination of a system of swingable arms earned by themain frame, saidsystem ineluding ;a"pair of arms, an upper and a lower one, with their swinging endsextend ing forwardly at either side of the machine,

a shift-frame within the main frame sup- I porting the carriage 1 and to be guided by said arms for case-shift movement, and an eccentric device at either side of said shiftframe to allow the sameto be adjusted relatively to the main frame to obtain proper relation between the carriage and the typebars, said device including'a disk rotatably fastened to the lshift-frame, an eccentric carrying one end of one of said upper arms,

and a locking 'deviceto lock said disk in "P ace- I 4. In a typewriting machine including a shift-frame relatively to the main frame'to I main frame, .acarriagemounted for case-i shiftmovementand swinging typ,ei-bars, the, combination ofa systemiof swingablearms Carried y B-Iiaani:frame,,said system in p eluding a,pair:, of arms, an upper. andia lower one, at either side; of; the main frame, u having their swinging ends extending hori 'zontally forwardly, the upper ones being conveniently accessiblei'to. the operato-r a shift-frame within the main framesupportr.

ing the carriage and to beqguided byvsaid arms for case-shift movement, and means adjustably connecting;said/upper armstoi L s the shift-frame, to alloweither sidelof the shift-frame to'be adjusted indepen,dently,-rel--..

atively to themain frame,'to, obtain propen I relation between the carriage andthetype 5. In a typewriting machine including; a main frame, a carriage mounted? for case shift movement and swinging type-bar's,the combination ofa system ofswingable arms carried by e the mainframe; said systemjin er arm, with their s wingingends extending forwardly-at eitherqside of the mainframe,

a, shift frame within'the main "frameisups porting the carriage I and gto be, f-guided, by

{said arms for case-shift,;moveinent,:andjan eccentric device at either-sideof the-Yshift frame to allowthef'shiftefraiiie tolbe ad- -justed relativelyflto the ,main' framelto 'ob-j tain proper relation ,betweenithe carriage and the type-bars, saidwdeviceincluding f'a disk rotatably connected to-theshifbfram'e and eccentricallycarrying one-end of onfe of said upper arms, and a locking device to lock-I;

said disk in place including a pin to befas-Q tened to the. shift-frame and cooperative with notches which are circumferentially;

formed on said disk.

eluding a pairofarms,anupper-anda low-2 ,f 99

said 1 arms forflcase-shift movement,=,-and

aneccentric device at-ei'ther side for change ing the, effective lengths; ofthe upper-arms; 5 said device including a: diskzrotatably',fas tened to the shift-franie-and carrying, .ec'-- centrically' one end of one-of said :upper e arms, said disk to-ibe rotated to adjust the] shift-frame relativelyito the main frame for proper relation, between carriage and type-,

bars. v

j 7 a typewriting machine"includingpa main frame, a 'r-carriag'e mounted;forgcasee; shift. movement and swingingitypebars, the combination of system of; swing'able a arms carried by the main frame, said system including a pair of arms, an upper one and a lower one, with their swinging ends extending forwardly ateither side of the main frame, a shift-frame within the main frame supporting the carriage and to be guided by said arms for case-shift movement, and an eccentric device at either side for changing the effective lengths of the upper arms to allow the shift-frame to be adjusted relatively to the main frame for proper relation between carriage and typebars, said device including a disk rotatably fastened to the shift-frame and eccentrically carrying one end of one of said upper arms and having concentric slots to serve as guides for its rotary movement for adjustment upon the shift-frame in cooperation with pins or screws fastened to the shiftframe within the slots. 7

8. In a typewriting machine including a main frame, a carriage mounted for caseshift movement and swinging type-bars, the combination of a system of swingable arms carried by the main frame, said system including a pair of arms, an upper and a lower one, with their swinging ends eX- tendingrforwardly at either side of'the main frame, a shift-frame within the main frame supporting the carriage and to be guided bysaid arms for case-shlft movement, and an eccentric device at eitherside forchanging theeffective lengths of the upper arms, to allow the shift-frame to be adjusted relatively to the main frame to obtain proper relation between the carriage and the typebars, said device including a disk rotatably fastened to the shift-frame and eccentrically carrying one end ofone of said upper arms, and a locking device to locksaid disk in place. 7 l

9. In a-typewriting machine including a main frame, a carriage mounted for caseeccentric device at either side for changing the effective lengths of the upper arms, to allow the shift-frame to be adjusted relatively to the main frame to obtain proper relation between the carriage and the typebars, said device including a manuallyoperable disk rotatably connected to the shift-frame and eccentrically carrying one end of one of said upper arms, and a locking 10. In a typewriting machine including a main frame, a carriage mounted for caseshift movement and swinging type-bars, the combination of'a system of swingable arms carried by the main frame, said system including a pair of arms, an upper and a lower one, with their swinging ends extending forwardly at either side of the main frame, a shift-frame within the main frame supporting the carriage-and to be uided by said arms for case-shift movement, and a manually-operable eccentric device at either side for changing the effective lengths of the upper arms, to allowthe shift-frame to be adjusted relatively to the main frame to obtain proper relation between the carriage and the type-bars, said device including a disk rotatably fastened to the shift-framea shift-frame within the main frame sup porting the carriage and to be guided by said arms for case-shift movement, and an eccentric device at either'side ofthe shiftframe to allow the shift-frame to be adjusted relatively to the main frame to obtain roper relation between the carriage and tie type-bars, said device'including a disk rotatabl y fastened to the shift-frame and eccentrically carrying one end of said upper arms and having circumferentially disposed notches or graduations to indicate the amount of rotation of the disk relative to the shift-frame.

EDWARD G. ROVLEY.

deviceto lock said disk in place including 'i a pin to be fastened tothe shift-frame and co-operative with notches which are circumferentially provided on said disk. 

